there seems to be a limit of discount rato when apply PC coupon with other sale discount.
25% or 20%? and base price is which ,, I can not calcutate and difine correctly.
I tried samething and reported here, then told about the limit by other kind man.
(I think it has been mentioned oficially about PC coupon , though it is fuzzy for me,
DAZ seems not mistake about it)
of course I hope more clear easy rule about pc coupon,
we usually better not apply coupon with other big ratio discounts.